阅读说明：本技术 一种供电电池盒及具有该供电电池盒的灶具 (Power supply battery box and stove with same ) 是由 夏瑞丽 施映红 于 2019-02-28 设计创作，主要内容包括：本发明涉及一种供电电池盒,包括盒体和盒盖,盒体内侧设有供电池容置的第一壳体,第一壳体的一端设置有与电池的负极端电连接的触点,第一壳体的另一端设有仅供电池的正极端穿出的开孔；盒体或盒盖在邻近开孔的端板上具有能相对该端板向外转动的翻板,翻板的内侧壁上设有导电弹性件,端板在对应位置开有供导电弹性件进出的让位口；在翻板处于完全外翻状态下,导电弹性件与正极端相脱离；在翻板处于遮蔽让位口的状态下,导电弹性件与正极端电连接,本发明涉及一种灶具。本发明在电池正确安装时,电池的正极端与开孔相配合,待翻板上的导电弹性件与电池的正极端电连接,即可保持电池通电；当电池装反时,电池无法安装在第一壳体内,避免了电池装反。(The invention relates to a power supply battery box, which comprises a box body and a box cover, wherein a first shell for accommodating a battery is arranged on the inner side of the box body, one end of the first shell is provided with a contact electrically connected with a negative electrode end of the battery, and the other end of the first shell is provided with an opening through which only a positive electrode end of the battery penetrates; the box body or the box cover is provided with a turning plate which can rotate outwards relative to the end plate on the end plate adjacent to the opening, the inner side wall of the turning plate is provided with a conductive elastic element, and the end plate is provided with a yielding hole for the conductive elastic element to enter and exit at the corresponding position; when the turning plate is in a completely outward turning state, the conductive elastic piece is separated from the positive end; the invention relates to a cooker, in which a conductive elastic piece is electrically connected with a positive electrode end when a turning plate is in a state of shielding a position-giving opening. When the battery is correctly installed, the positive end of the battery is matched with the opening, and the conductive elastic piece on the plate to be turned is electrically connected with the positive end of the battery, so that the battery can be kept electrified; when the battery adorns conversely, the battery can't be installed in first casing, has avoided the battery to adorn conversely.)

1. The utility model provides a supply battery case, includes box body (1) and lid (2) of locating on this box body (1) with closing, its characterized in that:

a first shell (31) for accommodating the battery (4) is arranged on the inner side of the box body (1), one end of the first shell (31) is provided with a contact (311) electrically connected with a negative electrode end (41) of the battery (4), and the other end of the first shell (31) is provided with an opening (312) for only penetrating out of a positive electrode end (42) of the battery (4);

the box body (1) or the box cover (2) is provided with a turning plate (111) which can rotate outwards relative to an end plate (11) adjacent to the opening (312), the inner side wall of the turning plate (111) is provided with a conductive elastic part (12), and the end plate (11) is provided with a position-giving opening (112) which can allow the conductive elastic part (12) to enter and exit at a corresponding position;

and when the turning plate (111) is in a complete eversion state, the conductive elastic piece (12) is separated from the positive terminal (42) of the battery (4);

when the turning plate (111) is in a state of shielding the position-giving opening (112), the conductive elastic piece (12) is electrically connected with the positive terminal (42) of the battery (4).

2. A supply battery pack as claimed in claim 1, wherein: the battery pack is characterized by further comprising a conducting plate (13), the conducting elastic piece (12) is a spring, a first surface of the conducting plate (13) is connected to a free end of the spring, and a second surface of the conducting plate (13) abuts against a positive electrode end (42) of the battery (4) when the turning plate (111) is in a state of shielding the position giving opening (112).

3. A supply battery pack as claimed in claim 1 or 2, wherein: let position mouth (112) by the local upset board (111) that outwards turns over of end plate (11) of box body (1) form, the upper end of turning over the board (111) links to each other with the last border that lets position mouth (112), and the lower extreme passes through buckle structure to be fixed on being close to letting position mouth (112) lower limb's end plate (11).

4. A supply battery pack as claimed in claim 3, wherein: the buckle structure comprises a clamping foot (1111) arranged at the lower end of the inner side wall of the turning plate (111), a clamping block (113) corresponding to the clamping foot (1111) is arranged on the inner side wall of the end plate (11), and the lower end of the turning plate (111) is arranged on the end plate (11) through the clamping fit of the clamping foot (1111) and the clamping block (113).

5. A supply battery pack as claimed in claim 1, wherein: the inner side of the box cover (2) is provided with a second shell (32), the box body (1) and the box cover (2) are in a closing state, the first shell (31) and the second shell (32) are closed to form an accommodating cavity (300) for accommodating a battery (4), and a heat insulation cavity (5) is formed by enclosing the peripheries of the first shell and the second shell and the inner walls of the box body and the box cover.

6. A supply battery pack as claimed in claim 5, wherein: be provided with strengthening rib (51) in thermal-insulated chamber (5), the inside wall of strengthening rib (51) and the periphery wall phase-match that corresponds the casing, the inside wall phase-match of the lateral wall of strengthening rib (51) and box body (1) or lid (2) that correspond.

7. A supply battery pack as claimed in claim 6, wherein: a plurality of first convex parts (511) are arranged on the inner side wall of the reinforcing rib (51), and the first convex parts (511) are in contact with the outer peripheral wall of the corresponding shell.

8. A supply battery pack as claimed in claim 5, wherein: first casing (31) and second casing (32) all are the semicylindrical, and all are provided with protruding muscle (30) along circumference extension on the internal perisporium of this first casing (31) and second casing (32), install under the state in holding chamber (300) in battery (4), protruding muscle (30) contact with the periphery wall of battery (4).

9. A supply battery pack as claimed in claim 8, wherein: be equipped with a plurality of second convex parts (301) on the inside wall of protruding muscle (30), under the state that battery (4) were installed in holding chamber (300), second convex part (301) offset or contact with the periphery wall of battery (4).

10. A supply battery pack as claimed in claim 9, wherein: the second convex parts (301) are uniformly distributed on the inner side wall of the convex rib (30), and the second convex parts (301) are connected together to form a corrugated shape.

11. A cooker with a power supply battery box of any one of claims 1 to 10, comprising a cooker chassis (6), the power supply battery box and an ignition structure (7) electrically connected with a battery (4) in the power supply battery box, wherein the cooker chassis (6) is provided with a cavity (6a), a heat insulation cover (8) is arranged in the cavity (6a) at a position close to the front side of the cavity, a space (8a) for accommodating the ignition structure (7) and the power supply battery box is formed by enclosing between the heat insulation cover (8) and a bottom wall (61) of the cooker chassis (6), an opening (611) for partially exposing the power supply battery box is formed in the bottom wall (61) of the cooker chassis (6), and heat dissipation holes (21) are formed in the peripheral wall of the power supply battery box below the opening (611).

12. Hob according to claim 11, characterized in that: a first conductive elastic sheet (121) electrically connected with the conductive elastic piece (12) and a second conductive elastic sheet (3111) electrically connected with the contact (311) are arranged in the power supply battery box, and the first conductive elastic sheet (121) extends upwards out of the box body (1) and is connected with one end of the ignition structure (7) through a first lead; the second conductive elastic sheet (3111) extends upwards out of the box body (1) and is connected with the other end of the ignition structure (7) through a second lead.

13. Hob according to claim 11, characterized in that: the power supply battery box is arranged in the opening (611) from bottom to top, the box cover (2) of the power supply battery box is positioned below the box body (1), the box cover (2) and the turning plate (111) are partially or completely positioned below the bottom wall (61) of the stove chassis (6), and the heat dissipation holes (21) are formed in the box cover (2).

Technical Field

The invention relates to a battery box, in particular to a power supply battery box and a stove with the same.

Background

Current gas cooking utensils generally all use the dry battery power supply, set up the battery case that is used for installing the battery in the gas cooking utensils usually, the battery can be to the some firearm power supply of gas-cooker, makes it normally ignite to guarantee the normal use gas-cooker.

Current battery case is like the chinese utility model patent "an electricity connection accessory for battery case" that patent number is ZL201620830047.5 (the publication number of granting is CN205846037U), battery case wherein includes power cavity casing, set up positive negative pole in the casing, the gas-cooker can continuously release the heat in the use, cause its inside spare part temperature higher, and make the temperature of battery higher, battery case in the above-mentioned patent can the holding battery, however, the heat dissipation that the battery in the battery case can not be fine, thereby the life of battery has been reduced, under extreme condition, danger such as battery explosion also can lead to.

In order to solve the above technical problem, for example, in chinese utility model patent No. ZL201721357171.5 (No. CN207233841U) of patent No. gas stove and battery box thereof, electrode connectors corresponding to the positive and negative electrodes of the battery are respectively provided on the inner surfaces of two opposite side walls of the battery box, one or more first through holes are provided in the part of the battery box located at the lower part of the gas stove housing, a second through hole is provided at the top of the battery box, and the first through hole, the battery box and the gap between the batteries and the second through hole form an airflow channel. The patent realizes better heat dissipation when the temperature of the battery is higher, but in the actual installation process of the battery, the situation that the positive pole and the negative pole of the battery are reversely arranged in the battery box can exist, so that the gas stove can not be normally used after the battery is assembled.

Therefore, further improvements to existing battery packs are needed.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a power supply battery box that can prevent a battery from being reversely mounted in the battery box and can supply power to the battery when a turning plate needs to rotate a certain angle while the battery is correctly mounted.

A second technical problem to be solved by the present invention is to provide a battery box for power supply, which reduces heat conduction to the battery, in view of the above-mentioned current state of the art.

A third technical problem to be solved by the present invention is to provide a battery box for power supply that prevents the battery from moving in the accommodating cavity, in view of the current situation of the prior art.

The fourth technical problem to be solved by the present invention is to provide a cooking stove that reduces heat transfer to the power supply battery box and the ignition structure, and simultaneously avoids overheating of the battery in the power supply battery box, in view of the current situation of the prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a supply battery case, includes that box body and lid close locate the lid on this box body, its characterized in that:

the inner side of the box body is provided with a first shell for accommodating a battery, one end of the first shell is provided with a contact electrically connected with the negative electrode end of the battery, and the other end of the first shell is provided with an opening through which the positive electrode end of the battery only penetrates;

the box body or the box cover is provided with a turning plate which can rotate outwards relative to the end plate on the end plate adjacent to the opening, the inner side wall of the turning plate is provided with a conductive elastic piece, and the end plate is provided with a yielding port for the conductive elastic piece to go in and out at the corresponding position;

when the turning plate is in a completely everted state, the conductive elastic piece is separated from the positive end of the battery;

and when the turning plate is in a state of shielding the position-giving opening, the elastic piece is electrically connected with the positive terminal of the battery.

The conductive elastic part can adopt a spring sheet form and a spring, and preferably further comprises a conductive sheet, the conductive elastic part is a spring, a first surface of the conductive sheet is connected to a free end of the spring, and a second surface of the conductive sheet abuts against a positive terminal of the battery when the turning plate is in a state of shielding the clearance opening.

From simple structure and processing cost perspective, dodge the mouth by the local outside board that turns over of turning over of the end plate of box body forms, the upper end that turns over the board links to each other with the last border of dodging the mouth, and the lower extreme passes through buckle structure to be fixed on the end plate of neighbouring dodging mouthful lower limb.

The clamping structure has various forms, can adopt a clamping fit form of the clamping foot and the clamping buckle, and can also adopt a fit form of the clamping buckle and the clamping hole, preferably, the clamping structure comprises a clamping foot arranged at the lower end of the inner side wall of the turning plate, a clamping block corresponding to the clamping foot is arranged on the inner side wall of the end plate, and the lower end of the turning plate is arranged on the end plate through the clamping fit of the clamping foot and the clamping block.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the inner side of the box cover is provided with a second shell, the box body and the box cover are in a closing state, the first shell and the second shell are closed to form an accommodating cavity for accommodating a battery, and a heat insulation cavity is formed by enclosing the peripheries of the first shell and the second shell and the inner walls of the box body and the box cover.

The power supply battery case adopts bilayer structure, in order to strengthen between lid and the second casing and between box body and the first casing, thermal-insulated intracavity is provided with the strengthening rib, the inside wall of strengthening rib and the periphery wall phase-match that corresponds the casing, the lateral wall of strengthening rib and the inside wall phase-match of the box body or lid that correspond. Thus, the double-layer shell is reinforced, and the outer shell of the power supply battery box is prevented from being deformed by external force.

In order to reduce the external heat and conduct to the corresponding casing through lid or box body, be provided with a plurality of first convex parts on the inside wall of strengthening rib, first convex part contacts with the periphery wall that corresponds the casing. Thus, the existence of the first convex part enables the reinforcing ribs to adopt point contact with the peripheral wall of the corresponding shell, and reduces heat conduction.

The technical scheme adopted by the invention for solving the third technical problem is as follows: first casing and second casing all are the halfcylinder, and all are provided with the protruding muscle that extends along circumference on the internal perisporium of this first casing and second casing, install under the state in holding chamber at the battery, protruding muscle contacts with the periphery wall of battery.

In order to further reduce heat conduction, a plurality of second convex parts are arranged on the inner side wall of the convex rib, and the second convex parts are abutted or contacted with the outer peripheral wall of the battery in the state that the battery is installed in the accommodating cavity. The presence of the second protrusion on the rib allows the rib to make point contact with the battery, reducing the amount of heat transferred to the battery through the rib.

In order to better fix the battery, the second convex parts are uniformly distributed on the inner side wall of the convex rib, and the second convex parts are connected together to form a corrugated shape.

The technical scheme adopted by the invention for solving the fourth technical problem is as follows: the utility model provides a cooking utensils with above-mentioned power supply battery case, includes cooking utensils chassis, power supply battery case and the ignition structure of being connected with the battery electricity in the power supply battery case, the cooking utensils chassis has the cavity, the cavity is provided with thermal-insulated cover on the position of neighbouring its front side, enclose between the diapire on thermal-insulated cover and cooking utensils chassis and close the space that forms and supply ignition structure and power supply battery case holding, just set up the opening that supplies power supply battery case part to expose on the diapire on the cooking utensils chassis, the louvre has been seted up on the perisporium that the power supply battery case is located the opening below.

In order to conveniently realize the electric connection between the battery and the power supply structure, a first conductive elastic sheet electrically connected with the conductive elastic piece and a second conductive elastic sheet electrically connected with the contact are arranged in the power supply battery box, and the first conductive elastic sheet extends upwards out of the box body and is connected with one end of the ignition structure through a first lead; the second conductive elastic sheet extends upwards out of the box body and is connected with the other end of the ignition structure through a second lead.

In order to facilitate the replacement of the battery and the overheating of the battery, the power supply battery box is arranged in the opening from bottom to top, the box cover of the power supply battery box is positioned below the box body, the part or the whole of the box cover and the turning plate is positioned below the bottom wall of the cooker chassis, and the heat dissipation holes are formed in the box cover. Therefore, the battery can be replaced only by opening the box cover and turning the turnover plate outwards; meanwhile, due to the heat dissipation holes, heat on the battery can be dissipated to the outside conveniently, and the heat dissipation of the battery is prevented.

Compared with the prior art, when the battery is correctly installed, the battery is installed in the first shell, at the moment, the positive terminal of the battery is matched with the opening of the first shell and penetrates out of the opening, then the turning plate is rotated, and the conductive elastic piece on the plate to be turned is electrically connected with the positive terminal of the battery, so that the battery can be kept electrified; when the battery is reversely arranged, the positive end of the battery is contacted with the contact in the first shell, and at the moment, the negative end of the battery cannot penetrate through the opening and is positioned outside the first shell, namely, the whole battery cannot be arranged in the first shell, so that the condition that the battery is reversely arranged in the power supply battery box is effectively avoided; in addition, when the battery box is correctly installed, when the conductive elastic piece on the turning plate is not electrically connected with the positive electrode end of the battery, the power supply of the battery cannot be maintained, and the power supply reliability of the battery is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of a battery in a state to be mounted according to an embodiment of the present invention (a case cover is in an open state);

FIG. 3 is a schematic view of the structure of FIG. 2 at another angle;

FIG. 4 is a cross-sectional view of an embodiment of the present invention;

FIG. 5 is a cross-sectional view of an embodiment of the invention (after installation of the battery);

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a schematic structural diagram of a rib according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a reinforcing bar according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a cooker in an embodiment of the invention;

FIG. 10 is a schematic view of the structure of FIG. 9 at another angle;

FIG. 11 is a schematic structural view of a cooking utensil in an embodiment of the present invention with a panel removed;

FIG. 12 is a cross-sectional view of FIG. 11;

FIG. 13 is an enlarged view of the portion B of FIG. 12;

FIG. 14 is a schematic view of the heat shield of FIG. 11 with the heat shield removed;

FIG. 15 is a schematic structural diagram of a cooker chassis in an embodiment of the invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 15, the power supply battery box according to the embodiment of the present invention is installed in a kitchen range, and the power supply battery box is mainly used for installing dry batteries, the kitchen range includes a kitchen range chassis 6, a power supply battery box, and an ignition structure 7 electrically connected to a battery 4 in the power supply battery box, the kitchen range chassis 6 has a cavity 6a, a heat insulation cover 8 is disposed in the cavity 6a at a position adjacent to the front side thereof, a space 8a for accommodating the ignition structure 7 and the power supply battery box is formed between the heat insulation cover 8 and a bottom wall 61 of the kitchen range chassis 6, an opening 611 for exposing a part of the power supply battery box is disposed in the position adjacent to the front side of the bottom wall 61 of the kitchen range chassis 6, a heat dissipation hole 21 is disposed in a peripheral wall of the power supply battery box exposed to the opening 611.

In this embodiment, this power supply battery case includes box body 1, lid 2, battery 4 and conducting strip 13 that locate on this box body 1 with closing, and the power supply battery case is installed in this opening 611 from bottom to top, and the lid 2 of power supply battery case is located the below of box body 1, and this lid 2 part or whole are located the below of the diapire 61 of cooking utensils chassis 6, in order to prevent that the battery is overheated, louvre 21 sets up on the perisporium of lid 2 to make things convenient for the heat on the battery to outwards spill out.

In this embodiment, the inner side of the box body 1 is provided with a first shell 31 for accommodating the battery 4 therein, the inner side of the box cover 2 is provided with a second shell 32, wherein, two ends of the box body 1 are provided with circular end plates 11, the box cover 2 is an arc-shaped wall and is involuted with the box body 1 to form a cylinder shape; the first casing 31 and the second casing 32 are both semi-cylindrical, and the two are closed to form an accommodating cavity 300 for accommodating the battery 4, and a heat insulation cavity 5 is formed between the peripheries of the first casing 31 and the second casing 32 and the inner walls of the box body 1 and the box cover 2. The existence of the heat insulation cavity 5 prevents the hot air in the cooker chassis from transferring heat to the battery. In order to realize the installation of the power supply battery box, the mounting plates 7 which extend outwards and are installed on the end plates 11 at the two ends of the box body 1 are arranged on the bottom wall 61, the mounting plates 7 are positioned below the bottom wall 61, the mounting holes 70 for the connecting pieces to pass through are arranged on the corresponding positions of the two mounting plates 7 and the bottom wall 61, and the power supply battery box is installed on the bottom wall 61 of the stove chassis 6 through the matching of the connecting pieces and the corresponding mounting holes 70.

In this embodiment, one end plate of the first casing 31 is provided with a contact 311 electrically connected to the negative end 41 of the battery 4, the other end plate of the first casing 31 is provided with an opening 312 through which the positive end 42 of the battery 4 only passes, the opening 312 is a semicircular hole, the end plates of the first casing 31 and the second casing 32 are both provided with semicircular holes 312, the two semicircular holes are paired to form a circular hole through which the positive end 42 of the battery 4 passes, and the size of the circular hole is slightly larger than the positive end 42 of the battery 4 and slightly smaller than the negative end 41 of the battery 4.

In order to facilitate the battery to be longitudinally compressed in the accommodating cavity, the end plate 11 of the box body 1 or the box cover 2 adjacent to the opening 312 is provided with a turning plate 111 capable of rotating outwards relative to the end plate 11, the turning plate 111 is provided with a conductive elastic element 12 on the inner side wall facing the opening 312, in the embodiment, the turning plate 111 is arranged on the end plate 11 of the box body 1, and the end plate 11 is provided with a abdication port 112 capable of allowing the elastic element 12 to enter and exit at a corresponding position; moreover, when the turning plate 111 is in a complete eversion state, the conductive elastic piece 12 is separated from the positive electrode end 42 of the battery 4; the conductive elastic element 12 can be electrically connected with the positive terminal 42 of the battery 4 in a state that the flap 111 is in a state of shielding the allowance opening 112. In this embodiment, the conductive elastic element 12 is a spring, and the acting end of the spring is connected to the conductive sheet 13, that is, the first surface of the conductive sheet 13 is connected to the free end of the spring, and the second surface of the conductive sheet 13 can abut against the positive terminal 42 of the battery 4 when the turning plate 111 is in the state of shielding the allowance opening 112.

In order to realize the electrical connection between the battery and the ignition structure, in this embodiment, a first conductive elastic sheet 121 electrically connected to the conductive elastic member 12 and a second conductive elastic sheet 3111 electrically connected to the contact 311 are disposed in the power supply battery box, and the first conductive elastic sheet 121 extends upward out of the box body 1 and is connected to one end of the ignition structure 7 through a first wire; the second conductive elastic sheet 3111 extends upward out of the box body 1 and is connected to the other end of the ignition structure 7 through a second wire.

The above-mentioned let position mouth 112 by the end plate 11 of box body 1 local outside turn over the board 111 that turns over forms of turning over, turn over the upper end of board 111 and let the position mouth 112 the last border and link to each other, the lower extreme passes through buckle structure to be fixed on the end plate 11 that is close to let position mouth 112 lower border, can also adopt the lower extreme that turns over the board and let the position mouth 112 the lower border link to each other, the upper end passes through buckle structure to be fixed on the end plate 11 that is close to let position mouth 112 upper border, specifically select according to actual need. The buckle structure comprises a clamping foot 1111 arranged at the lower end of the inner side wall of the turning plate 111, a clamping block 113 corresponding to the clamping foot 1111 is arranged on the inner side wall of the end plate 11, and the lower end of the turning plate 111 is arranged on the end plate 11 through the clamping cooperation of the clamping foot 1111 and the clamping block 113. Further, a handle portion 114 is provided on the outer side wall of the end plate 11.

In this embodiment, be provided with strengthening rib 51 in the thermal-insulated chamber 5, the inside wall of strengthening rib 51 and the periphery wall phase-match that corresponds the casing, the lateral wall of strengthening rib 51 and the inside wall phase-match of the box body 1 or lid 2 that correspond. As shown in fig. 7, a plurality of first protrusions 511 are provided on the inner side walls of the ribs 51, and the first protrusions 511 contact the outer peripheral wall of the corresponding housing; the outer side wall of the rib 51 is provided with a plurality of third protrusions 512, and the third protrusions 512 contact with the inner peripheral wall of the case body 1 or the case cover 2. Moreover, the first convex parts 511 are uniformly distributed on the inner side wall of the reinforcing rib 51, and the first convex parts 511 are connected together to form a corrugated shape; the third protrusions 512 are uniformly distributed on the outer side wall of the rib 51, and the third protrusions 512 are connected together to form a corrugated shape.

In order to fix the battery and prevent the battery from moving in the accommodating chamber, the inner peripheral walls of the first case 31 and the second case 32 are provided with ribs 30 extending in the circumferential direction, and the ribs 30 contact the outer peripheral wall of the battery 4 in a state where the battery 4 is mounted in the accommodating chamber 300. In order to reduce the heat transfer to the battery, as shown in fig. 8, a plurality of second protrusions 301 are disposed on the inner sidewall of the rib 30, a plurality of fourth protrusions 302 are disposed on the outer sidewall of the rib 30, when the battery 4 is installed in the accommodating cavity 300, the second protrusions 301 abut against or contact the outer peripheral wall of the battery 4, and the fourth protrusions 302 are connected to the inner sidewall of the accommodating cavity 300. The second protrusions 301 are uniformly distributed on the inner side wall of the rib 30, and the second protrusions 301 are connected together to form a corrugated shape.

In this embodiment, lid 2 and the first side rotation of the face of involuting of box body 1 are connected, and fixed connection can be dismantled through buckle structure to the second side. Specifically, a second side of the box cover 2 is provided with a clamping portion 22, correspondingly, an inner side wall of the second side of the box body 1 is provided with a projection 15 matched with the clamping portion 22, and the box cover 2 is installed on the box body 1 through clamping and matching of the clamping portion 22 and the projection 15.